Impact of water and thermal induced crystallizations in a PC/MXD6 multilayer film on barrier properties

Messin, Tiphaine; Marais, Stéphane; Follain, Nadège; Chappey, Corinne; Guinault, Alain; Miquelard‐Garnier, Guillaume; Delpouve, Nicolas; Gaucher, Valérie; Sollogoub, Cyrille

doi:10.1016/j.eurpolymj.2018.12.021

Cited by 12 publications

(10 citation statements)

References 31 publications

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“…The fact that the water solubility coefficient is decreased when PLA and PBS are confined in the multinanolayer does not prevent the plasticization phenomenon to occur as revealed by the plasticization coefficient γC M which, however, is slightly reduced compared to those of PLA and PBS (Table 3). It is known that the water plasticization phenomenon exists in dense material without highly increasing the solubility while increasing highly the diffusivity such as for glassy and semi-crystalline polymer, MXD6 for example [58][59][60]. In this latter case, the water diffusivity is increased to such a point that rearrangement of amorphous chains induces crystallization while the water solubility remains low.…”

Section: Water Barrier Propertiesmentioning

confidence: 99%

Biodegradable PLA/PBS multinanolayer membrane with enhanced barrier performances

Messin

Marais

Follain

et al. 2020

Journal of Membrane Science

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Polyester multilayer membranes with more than 2000 alternating layers of poly(lactic acid) (PLA) and poly (butylene succinate) (PBS) were successfully prepared via a nanolayer coextrusion process equipped with a multiplying-element device. This process allows to make films consisting of very thin layers of polymers and in which a confinement effect of the semicrystalline polymer can be induced at point to significantly improve its physical properties. In this work, a homogeneous multinanolayer film of PLA/PBS was obtained without defaults or delamination, while the two polymers are immiscible. Continuous and homogeneous ultrathin layers of PBS (~45 nm) were obtained and the resulting confined structure of PBS led to an improvement of its barrier performances until 30% for oxygen, 40% for water and 70% for carbon dioxide. This improvement was explained by a decrease of the solubility coefficient and surprisingly not by the diffusion coefficient. This result was attributed to a slight orientation of the crystals in the extrusion direction and to the probable presence of an interphase between the layers of PLA and PBS.

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Section: Water Barrier Propertiesmentioning

confidence: 99%

Biodegradable PLA/PBS multinanolayer membrane with enhanced barrier performances

Messin

Marais

Follain

et al. 2020

Journal of Membrane Science

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“…This hypothesis is commonly used in the study of multilayer films. 19,22 Figure 8 shows the whole permeability data set in the aim to picture the evolution of the barrier properties with changing PLLA microstructure (both crystalline and amorphous phases). The exact conditions and numerical data of each point are shown in the Supporting Information S.5.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…18−23 However, results were often behind expectation. 10,19,22,23 Amorphous-phase dynamics play also a decisive role in the overall barrier properties. In the case of PLA, this was studied in the last years by several groups [3][4][5]24 and summarized in the recent review of Sonchaeng et al 2 However, the impact of confinement of PLA between the hard walls of a second glassy polymer on the barrier properties in such a context has not been studied yet.…”

Section: ■ Introductionmentioning

confidence: 99%

Impact of Nanoconfinement on Polylactide Crystallization and Gas Barrier Properties

Nassar

Delpouve

Sollogoub

et al. 2020

ACS Appl. Mater. Interfaces

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The barrier properties of poly(L-lactide) (PLLA) were investigated in multinanolayer systems, probing the effect of confinement, the compatibility between the confining and the confined polymer, crystal orientation, and amorphous phase properties. The multilayer coextrusion process was used to confine PLLA between two amorphous polymers (polystyrene, PS; and polycarbonate, PC), which have different chemical affinities with PLLA. Confined PLLA layers of approximately 20 nm thickness were obtained. The multinanolayer materials were annealed at different temperatures to obtain PLLA crystallites with distinct polymorphs. PLLA annealed in PC/PLLA films at 120°C afforded a crystallinity degree up to 65%, and PLLA annealed in PC/PLLA or PS/PLLA films at 85°C had a crystallinity degree of 45%. WAXS measurements evidenced that the PLLA lamellas between PS layers had a mixed in-plane and on-edge orientation. PLLA lamellas between PC layers were uniquely oriented in-plane. DMA results evidenced a shift of the PC glass transition toward lower temperature, suggesting the possible presence of an interphase. The development of the rigid amorphous fraction (RAF) in the amorphous phase during annealing was impacted by the confiner polymer. The RAF content of semicrystalline PLLA was about 15% in PC/ PLLA, whereas it was neglectable in PS/PLLA. The oxygen barrier properties appeared to be governed by RAF content, and no impact of the PLLA polymorph or the crystalline orientation was observed. This study shows that the confinement of PLLA on itself does not impact barrier properties but that the proper choice of the confiner polymer can lead to decrease the phase coupling which creates the RAF. It is the prevention of RAF that decreases permeability.

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“…D eff , without considering to which mechanism it corresponds, represents net moisture movement. D eff of water vapor through films was calculated from the DVS data obtained at RH conditions from 0 to 90% at 25 °C, and diffusion kinetics of water vapor through films were evaluated using techniques given by Enrione et al (2007), and Messin et al (2019).…”

Section: Diffusion Of Water Vapormentioning

confidence: 99%

Sorption, diffusivity, permeability and mechanical properties of chitosan, potassium sorbate, or nisin incorporated active polymer films

2020

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The active multilayer packaging films were formed from low-density polyethylene (LDPE) and polyamide containing a 2% antimicrobial agent in one of the LDPE sides of the film (LDPE/polyamide/LDPE-2% antimicrobial agent). The antimicrobial agents used were potassium sorbate (PS-film), nisin (N-film), or chitosan (CTS-film). The effects of antimicrobial incorporation on water vapor permeability (P), diffusivity (D eff ), and solubility (S o and S H ) of the active and control films (LDPE/ polyamide/LDPE) were investigated. A dynamic vapor sorption analyzer (DVS) was used to estimate the sorption isotherms of the films at 25 °C. Peleg was found to be the best equation to describe sorption behaviors. The addition of PS and nisin into the film matrix resulted in a lower P than that of the control film. The D eff values of the active films were lower than those of control films, except for the CTS-film. The high water-holding capacity of PS and nisin might limit the D eff of the respective films. It was found that Henry's law was applicable to relate P, D eff , and S o and S H values of the multilayer film [correlation coefficient (r) = 0.909-0.971]. The mechanical and thermal properties of the active films were not significantly affected by the incorporation of PS and nisin (p [ 0.05). However, the impact of stress and elongation (transverse direction) on the CTS-film was lower than on other films, which indicated that chitosan improved the mechanical properties of the film.

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Impact of water and thermal induced crystallizations in a PC/MXD6 multilayer film on barrier properties

Cited by 12 publications

References 31 publications

Biodegradable PLA/PBS multinanolayer membrane with enhanced barrier performances

Biodegradable PLA/PBS multinanolayer membrane with enhanced barrier performances

Impact of Nanoconfinement on Polylactide Crystallization and Gas Barrier Properties

Sorption, diffusivity, permeability and mechanical properties of chitosan, potassium sorbate, or nisin incorporated active polymer films

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